Car travel is often the most convenient and least stressful way to transport a Shih Tzu, and the breed's small size makes it well suited to riding in most vehicles. The most important consideration for car travel with a Shih Tzu is proper restraint. An unrestrained dog in a moving vehicle is at serious risk of injury in the event of a sudden stop or collision, and a loose dog can also distract the driver. A crash-tested carrier or a pet-specific seat belt harness are the best options for keeping a Shih Tzu safe during car rides.
The Shih Tzu's brachycephalic facial structure makes temperature regulation an important concern during car travel. Flat-faced breeds are more susceptible to overheating than breeds with longer muzzles, because their shortened airways are less efficient at cooling incoming air. The vehicle should be kept well air-conditioned during warm weather, and a Shih Tzu should never be left unattended in a parked car, even for a few minutes. Interior car temperatures can rise to dangerous levels in a matter of minutes, even on moderately warm days.
For longer road trips, planning regular stops is essential. Shih Tzus benefit from breaks every two to three hours for water, bathroom needs, and a brief stretch. Bringing a portable water bowl and a supply of fresh water ensures that the dog stays hydrated throughout the journey. Familiar items such as a favorite blanket or toy can help reduce anxiety and provide comfort in the unfamiliar environment of a moving car.
Motion sickness can affect some Shih Tzus, particularly puppies and dogs that are not accustomed to car travel. Signs of motion sickness include drooling, restlessness, whining, and vomiting. Gradual acclimation through short, positive car rides can help most dogs overcome this issue over time. For dogs with persistent motion sickness, a veterinarian may recommend medication or other interventions to make car travel more comfortable.